On Sex Why

101 sex life hacks and why you need them

Ida Rundberg

Why Women Have Sex

David M. Buss, Cindy M. Meston

The Dangerous Passion: Why Jealousy Is as Necessary as Love and Sex

David M. Buss

Mismeasure of Woman : Why Women are Not the Better Sex, the Inferior Sex, or the Opposite Sex

Carol Tavris

Why Men Fake It

Abraham Morgentaler

Vitamin O : Why Orgasms are Vital to a Woman's Health and Happiness, and How to Have Them Every Time!

Natasha Janina Valdez

Crazy Little Thing : Why Love and Sex Drive Us Mad

Liz Langley

Strong Foundations : Why pelvic health matters – An empowering guide to understanding your body

Why is Sex Fun?

Jared Diamond

Why Do Men Fall Asleep After Sex

Mark Leyner, Billy Goldberg

Generation F : Why we still struggle with sex and power

Virginia Trioli